Motor Plants & Auxiliary Boilers USCG Question #953 (Set 20)

If a slow-speed two-stroke cycle diesel engine is fitted with exhaust valves located in the cylinder heads, what scavenging flow-pattern is utilized?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Uniflow scavenging

Uniflow scavenging utilizes intake ports at the cylinder bottom and a centrally located exhaust valve in the cylinder head, creating an efficient bottom-to-top vertical airflow pattern.

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